While you wait for answers, we may have found some information which could help you.
Click here for Boiler Heating HwAriston Microgenus 23 MFFI PCB Defect?
error code e02 wont work when pressurised?
I have an Ariston Clas He system with an error code of 1P2?
boiler keeps going out?
ariston boiler slow to ignite?
I have error code 108 on my Ariston Combi boiler what do I do to fix it?